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Blood Circulation, Adult & Fetal Should discuss basic

Resolved Question:

Blood Circulation, Adult & Fetal
Should discuss basic differences in adult and fetal blood circulation.
Should discuss all structural modifications of the fetal heart
Submitted: 5 years ago.
Category: Medical
Expert:  Dr. Gupta replied 5 years ago.
MD Doc :

Hello & welcome to Just Answer!

If you have any questions after reading my answer, be sure to let me know.

Customer: Ok thank you
MD Doc :

The most important difference is that the fetus does not use lungs for oxygenation, and instead uses the placenta to get in oxygenated blood from its mother, and put out the deoxygenated blood

MD Doc :

In simple tersm

MD Doc :


MD Doc :

The umbilical vein brings oxygenated and nutrient rich blood from the placenta into the right atrium. From there, it travels through the Foramen Ovale, which is a one way valve between the right atrium and the left atrium. This essentially short circuits the lungs. Return blood back to the placenta is via the umbilical artery.

MD Doc :

At birth, when the infant starts breathing, the pressure differential between the left atrium and the right atrium increases, causing the Foramen Ovale to close, removing the short circuit. Now, blood has the full path from right atrium, to right ventricle, to lungs, to left atrium, to left ventricle, to the body, and repeating.

MD Doc :

For a more technical reply check this link

MD Doc :

Please remember to accept the answer by pressing the GREEN accept button, do get back for any clarifications

Customer: Thank u
MD Doc :

You are welcome,

MD Doc :


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